.btn.btn-dark.btn-lg.referral-share-btn {
    display:flex; 
    place-items: center;
    justify-content: center;
}

#izpjqr{
  display:none;
}

.step4 #izpjqr{
    justify-content: center;
    margin: 1rem auto -1rem;
    display: flex;  
}

@media (max-width: 450px) {  
   #referral-share-buttons-38 div{
      display: flex;
      flex-direction: column;
   }
}